Asymmetric hydrogenation of 3-methyl-fumaric and maleic ester monoaldehydes protected as neph-derived oxazolidines
作者:Anna Bernardi、Oliviero Carugo、Alessandra Pasquarello、Atanas Sidjimov、Giovanni Poli
DOI:10.1016/s0040-4020(01)89738-6
日期:1991.8
The hydrogenation of 3-methyl-fumaric and maleic ester mono aldehydes protected as oxazolidines of nor-ephedrine (NEPH) derivation has been studied. This transformation takes place with moderate to good pi-face stereodifferentiation and allows the preparation of non-racemic 3-methyl-succinaldehydic acid methyl ester (1, R = Me). The factors dictating the diastereocontrol are discussed.